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user717
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86
What is a cohomology theory (seriously)?
Nov 19, 2009
46
Universal definition of tangent spaces (for schemes and manifolds)
Nov 4, 2009
39
Why are flat morphisms "flat?"
Nov 25, 2009
38
Why is Milnor K-theory not ad hoc?
Nov 5, 2009
38
Definitions of Hecke algebras
Nov 7, 2009
32
How can I really motivate the Zariski topology on a scheme?
Dec 8, 2009
30
Errata database?
Oct 28, 2009
20
Closed vs Rational Points on Schemes
Feb 2, 2010
18
Preschemes and schemes
Jan 10, 2010
17
What are the motivations for studying Cherednik (symplectic reflection, graded Hecke) algebras?
Apr 29, 2010